Secondary electric clock.



J. STBIGER & J. BESANQON.

SECONDARY ELECTRIC CLOCK. APPLIOATIONIILED JULY 7, 1908.

Patented Apr. 27, 1909.

2 SHEETS-SHEET 1.

J, STBIGER & J, BESANQO-N.

SECONDARY 511301 1110 CLOCK. APPTJIUATION FILE]; JULY 7, 1908.

Patented 2?,

2 SHEETS-SIIEET 2.

Wig/ J JACOB STEIGER AND JAMES BESANGON, OF LA OHAUX-DE-FONDS, SWITZERLAND.

snconnany vnnao'rnro onocxi Specification of Letters Patent.

Application filed. m 7, 1908. Serial No. 442,334.

Patented April 27, 1909,

"- zerland, have invented a new and useful Ima without dial or hands.

l) and the field magnets c, carries a worm d operating a worm wheel 0 fixed to one end of a shaft f whose other end carries a pinion g which engages with a wheel hadjusted by easy friction on the journal 01 of a shaft or arbor k by means of a spring lwith three branches adapted to be pressed at will against the said wheel h by means of a nut m (Fig. 2) screwed on a screw threaded part of the shaft k. I

The shalt or arbor kcarr ies, fixed on it, a pallet n acting on the teeth of a wheel'o fixed to one end of a set-hands arbor p whos'e'other end carries the cannon pinion g of which the cannon is intended to carry the minute hand and on which is placed the cannon wheel 7' intended to carry the hour hand. This cannon pinion and this cannon wheel gear with a minute wheel transmission of the usual ty e. The pallet it acts on the teeth of the whee 0 in the same manner for example as indicated in the Swiss Patent 37373; that is to say, that for each semi-oscillation of the pallet the .wheel 0 rotates one half tooth. I

The current'transmitted to the motor by the main clock every minute in a cont ary direction imparts to the armature bf of' the motor a sufiicient speed of rotation which permits of advancing for one half tooth the wheel 0 by the semi-oscillation of the pallet; The period during which theicurrent. passes to the motor through the conductors s, t and the brushes u, c is such-that the armature makes several rotations alter the, pallet has e'll'ected its se1ni-oscillation, but,-as the pallet abuts aga'nst'its wheel a, the wheel it re- Jvolves idly on the shaft is owing to its adjustment by easy friction. There is thus no shock in the transmission from the motor to the hands, and the advancement of the hand minute byniinute, is eil'ected silently. Instead of the wheel it being adjusted by easy friction on its shaft, one of the toothed members carrying this wheel, for example the wheel e or the pinion g, might be adjusted in like manner. I

The tornrand dimensions of the members described, the adjustable arrangement of the wheel h on its shaft and the number of teeth of the pinions and wheels may vary.

- Having now described our invention, we

claim as new and wish to secure by Letters Patent 1. In a secondary electric clock, the combination of a wheelto transmit motion to the hands, a pallet coacting with said wheel, and an electric motor having a rotary armature which makes complete revolutions and by which said pallet is actuated:

2. In a secondary electric clock ,-the conibination of a hand-operating wheel, apallet coacting therewith, and a'rotary electric motor unlimited inits rotary movement and connected with the pallet to actuate the same.

3. In a secondary electric clock, the combination with the hand-operating wheel, and a pallet coacting therewith, of a rotary electric motor driven alternately in opposite di-- rections, and a lost-motion connection between said motor and said pallet.

4. In a secondary electric clock, the combination of a hand-operating wheel, an arbor, a pallet fixed to said arbor and coactin with said wheel, a. wheel mounted frictiona ly on said arbor, and means to drive said wheel.

5. In a secondary electric clock, the com'- bination of a hand-operating wheel, an arbor, a pallet fixed to said arborand coacting with said wheel, a toothed wheel mounted frictionally on said arbor, and means to positively drive said toothed wheel alternately in op osite directions.- 6. n a secondary electric clock, the combination with the pallet, and'the hand-operatin'g wheel operated thereby, of a rotary electric motor so connected with the pallet that-the latter is driven only,to a certain extent, regardless of the number of revolutions of the motor;

7. In a secondary electric clock, the comhinetion of a hand-operating Wheel, a, pallet (reacting; therewith, an arbor to which the pallet is fixed, a Wheel frictionally mounted on said arbor, and a rotary electric motor geared to said Wheel and by which the same is rotated alternately in opposite directions.-

8. In a secondary electric clock, the combi'nation of {L rotary electric motor, a toothed wheel positively driven thereby, a hand-op- 10 era-ting Wheel, pallet coac'ting therewith,

and a lost-motion connection between said pallet and said first-named Wheel.

5 In testimony, that We claim the foregoing 1 as our invention, we liave signed our names 1 in presence of two subscribing Witnesses.

JACOB STEIGER.

JAMES BESANQON.

ARNOLD E. KOFFEY,

i Witnesses:

i C. DUBQIS. 

